[WorldMaker]

Mozilla (and Chromium) could mirror Top X Google Fonts directly into the user's font system and entirely eliminate remote calls for a small size increase in the browser installation.

(Or Microsoft and Apple could do it in OS images.)

You can do it yourself, even, but unfortunately font loading timings are a deanonymization vector with its own privacy implications and it would take a concerted group effort to install similar font sets locally to avoid those privacy issues.

[snazz]

That would be an interesting concept. I like the idea of including them in Windows and macOS.